Cleaning device, method for cleaning, and use of a cleaning device for fast-running surfaces

Abstract

The invention relates to a cleaning device (1) with at least two cleaning elements (7) which are mutually spaced and rotatable, the cleaning elements (7) having movable bristles (12). According to the invention, a suction device (2) is arranged between the at least two cleaning elements (7).

Description

[0001]PC 240245 C March 8, 2024 Cleaning device, method for cleaning and use of a cleaning device for fast-moving surfaces The invention relates to a cleaning device, in particular for fast-moving surfaces, with at least two cleaning elements which are spaced apart from one another and movable, for example rotatable, wherein the cleaning elements have movable bristles. Such a cleaning device is widely used in practice. The invention further relates to a method for cleaning a soiled surface. Such a method is known in the prior art. The invention further relates to the use of a cleaning device. Such a use is known.In the prior art, it is often the case that moving surfaces contaminated with dirt particles and moving at a speed of, for example, 1 meter per second or higher can only be cleaned inadequately because the dirt particles often stick. The invention seeks to address this and eliminate the disadvantages of the prior art. The invention is based on the object of improving the operating characteristics of a cleaning device, in particular improving the cleaning of fast-moving surfaces. This object is achieved by the features of the independent claims. Advantageous embodiments are described in the subclaims. It should be noted that the features individually listed in the dependent claims can be combined with one another in any technologically expedient manner and define further embodiments of the invention. PC 240245 C 2 / 26 8.March 2024 Furthermore, the features specified in the claims are specified and explained in more detail in the description, with further preferred embodiments of the invention being presented. To achieve this object, the invention proposes the features of claim 1. In particular, in a cleaning device of the type described above, the invention proposes that a suction device is arranged between the at least two cleaning elements. Thus, the wiping effect of the cleaning elements in combination with suction can achieve advantageous cleaning of a dirty and moving surface. This is particularly the case for surface speeds in the range of 10 meters per second and higher. The suction device is located directly between the at least two cleaning elements and perpendicular to and above the moving surface to be cleaned.The suction device is arranged along a normal vector of the moving surface. Between the at least two cleaning elements can mean that the suction device is physically located there. Although suction devices are known in the prior art, they are not located between the cleaning elements, but typically in a head region or foot region of the cleaning elements. The cleaning elements can have movable bristles. To achieve this object, the invention proposes the features of claim 2. In particular, in a cleaning device of the type described above, the invention proposes that the PC 240245 C 3 / 26 March 8, 2024 at least two cleaning elements have different permeabilities. The permeability is preferably designed with respect to fluids. A fluid is described here as a substance which is gaseous or liquid.This allows fluids to flow differently through the at least two cleaning elements, allowing targeted cleaning to be carried out. This leads to increased cleaning quality. The permeability of the cleaning elements is referred to here as permeability, with the permeability being expressed as a meter squared unit. In an advantageous embodiment, it can be provided that a transport device is designed which causes a contaminated surface to move relative to the at least two cleaning elements in a transport direction. The speed of the contaminated surface can be 10 meters per second or more. This can increase the cleaning ability of the cleaning device. In an advantageous embodiment, it can be provided that the at least two cleaning elements are designed as bristle rollers and additionally or alternatively as bristle belts.Thus, cleaning elements can be provided depending on the situation and the degree of soiling. Bristle rollers are understood to be cylindrical objects which have bristles and can perform a rolling movement. Bristle belts, on the other hand, are similar to a belt and have a direction of movement that runs along the belt. Bristle belts thus have a direction of movement that is transverse, preferably orthogonal, to the transport direction of the transport device. Bristle rollers, on the other hand, have a direction of movement that runs along the transport direction. The soiled surface can be a wooden surface, a plastic surface, a metal surface, a glass surface or a paper surface. In an advantageous embodiment, it can be provided that a negative pressure prevails between the at least two cleaning elements.This negative pressure is preferably provided or created by the suction device. This allows dirt particles detached from the surface to be easily vacuumed away. In an advantageous embodiment, it can be provided that the distance between the bristles and the soiled surface is not constant in one area of ​​the surface. The area of ​​the surface is preferably a lateral area of ​​the surface. This is intended to ensure that the area of ​​the surface is not damaged by the rotating cleaning elements or that the rotating cleaning elements are not damaged by the lateral area of ​​the surface. The soiled surface is in particular a band-shaped surface. In an advantageous embodiment, it can be provided that the cleaning elements move in a direction of movement which is arranged transversely, in particular orthogonally, to the transport direction of the soiled surface.The bristles of the cleaning elements clean the soiled surface of dirt particles through their rotary movement, whereby these are then guided between the at least two cleaning elements and sucked away by the PC 240245 C 5 / 26 March 8, 2024 suction device. The cleaning properties of the cleaning elements can be improved by the transverse arrangement of the transport direction to the direction of movement. In this application, orthogonal is understood to mean an angle between 85° and 95°. In this application, transverse is referred to as an angle which is greater than 0° and less than 90°. In an advantageous embodiment, it can be provided that one of the at least two cleaning elements has flow channels transverse to the transport direction of the soiled surface. Preferably or alternatively, the flow channels are formed transversely to the direction of movement of the at least two cleaning elements.Dirt particles can be carried through the flow channels of the cleaning elements, whereby a negative Coanda effect can occur due to the suction effect of the suction device. The Coanda effect describes various phenomena which suggest a tendency of a gas jet or a liquid flow to run along a convex surface instead of breaking away and continuing in the original flow direction. In an advantageous embodiment, it can be provided that the at least two cleaning elements have the same permeability. This can be advantageous, for example, for certain dirty surfaces. This can increase the flexibility of the cleaning elements with respect to the dirty surface. In an advantageous embodiment, it can be provided that the flow channels are formed by bristles of different lengths or by a bristle-free partial body which is attached to the PC 240245 C 6 / 26 8.March 2024 cleaning element is located. The permeability of the cleaning elements can thus be adapted precisely to the situation, in particular depending on the speed of the soiled surface and the degree of soiling. In an advantageous embodiment, it can be provided that the cleaning elements are operated in opposite directions or in the same direction, in particular wherein one direction of movement of the cleaning elements, for example the one already mentioned, is the same direction or in opposite directions. The setting of the direction of movement depends, for example, on the degree of soiling and / or the type of material to be cleaned. In an advantageous embodiment, it can be provided that squeegees are formed. The squeegees are preferably arranged at a reversal point of the cleaning elements.Additionally or alternatively, the squeegees contact the cleaning elements and thereby strip dirt particles from the cleaning elements, in particular the bristles. Thus, the cleaning elements can be cleaned with the aid of the squeegee, preventing dirt particles from being circulated solely in the direction of movement of the cleaning elements. In an advantageous embodiment, the squeegee can be provided with a separate suction unit that extracts the dirt particles stripped by the squeegee. The suction unit can be designed separately or as part of the suction device. This prevents the dirt particles from adhering to the bristles and from being merely circulated in the direction of movement. In an advantageous embodiment, the at least two cleaning elements can have flow channels of different dimensions and permeabilities. PC 240245 C 7 / 26 8.March 2024 Preferably, the flow channels are arranged transversely to a direction of movement of the cleaning elements, for example, the one already mentioned. Thus, the cleaning elements can be adapted to the type of dirt particles, the material of the contaminated surface, and the speed of the transport device. The permeabilities can be adjusted by the dimensioning and design of the flow channels. A cleaning element without flow channels has a lower permeability than a cleaning element with flow channels. In an advantageous embodiment, it can be provided that the flow channels are linear. This can positively influence the mobility of the dirt particles through the cleaning elements. In an advantageous embodiment, it can be provided that an angle α between a longitudinal axis of the flow channels and a width of the cleaning element lies between 0° and 60°.Such an angle design has proven particularly advantageous in experiments. In an advantageous embodiment, it can be provided that the suction device comprises a collection unit for collecting dirt particles. In this way, dirt particles can be elegantly removed from the circulation of the cleaning elements and functionally collected. This is particularly relevant for larger and heavier dirt particles that cannot be easily removed by the suction device. A collection unit is understood to be a unit in which a concentration of dirt particles increases and these accumulate within the collection unit and are not transported away from there. PC 240245 C 8 / 26 March 8, 2024. The dirt particles are preferably removed manually, in particular by hand, from the collection unit.Heavy dirt particles that cannot be vacuumed away by the suction device tend to accumulate in the collection unit. In an advantageous embodiment, it can be provided that the cleaning element upstream of the dirty surface in the transport direction has a higher permeability than the downstream cleaning element. This can improve the cleaning function because dirt particles can pass through the first cleaning element more easily and have greater difficulty passing through the cleaning element located behind it. In an advantageous embodiment, it can be provided that the aforementioned angle α is different for two of the at least two cleaning elements. This can precisely match the permeability of the cleaning elements to the cleaning situation.For example, the two cleaning elements can be mirrored to one another, or the two flow channels can be arranged at angles of different magnitudes. In an advantageous embodiment, it can be provided that the suction device has a slotted opening whose width is smaller than the spacing of the at least two cleaning elements from one another and through which the dirt particles can be sucked off. In this way, an advantageous circulation or flow can be achieved in the suction device, which is advantageous for cleaning. In an advantageous embodiment, it can be provided that a (single-part or multi-part) slotted opening designed for sucking off dirt particles, for example the one already mentioned, has a longitudinal extent (L1) that is greater than one half, in particular greater than three-quarters, of a length of at least one of the cleaning elements.Thus, suction can be achieved over the complete and / or as uniform as possible extension of a workpiece to be cleaned transversely to its transport direction. The longitudinal extension can be given, for example, by a distance between the ends of a (single-part) slot forming the slot opening or of a (multi-part) slot arrangement, or by a sum of the clear internal dimensions of a (multi-part) slot arrangement. In an advantageous embodiment, it can be provided that the suction device has a funnel-shaped base body, in the bottom of which the slot opening and the collection unit are formed adjacent to it. This makes it possible to provide advantageous flow dynamics in the base body, which is beneficial for the removal of dirt particles. The bristles are preferably open at the sides.In an advantageous embodiment, it can be provided that the at least two cleaning elements are arranged on both sides of the soiled surface in a mirror-symmetrical manner. This allows both sides of the surface to be cleaned efficiently. In an advantageous embodiment, it can be provided that two suction devices are formed which are arranged on both sides of the soiled surface in a mirror-symmetrical manner. This allows both sides of the surface to be cleaned efficiently. PC 240245 C 10 / 26 March 8, 2024 In an advantageous embodiment, it can be provided that the transport direction of the soiled surface and a direction of movement of the cleaning elements, for example the direction already mentioned, are arranged transversely, in particular orthogonally, to one another.The cleaning ability of the cleaning device can thus be improved because the dirt particles can be removed from the surface more easily when the direction of movement is transverse to the transport direction. In an advantageous embodiment, it can be provided that the at least two cleaning elements have a step, wherein in an area in front of the step the bristles of the cleaning element are raised from the soiled surface. This is particularly advantageous in an edge area of ​​the surface because it prevents the surface from being damaged or torn off by the rotation of the cleaning elements. To achieve the stated object, the features of the independent claim directed to a method for cleaning a soiled surface are provided according to the invention.In particular, to achieve the stated object, the invention proposes, in a method of the type described above, that dirt particles are guided through at least two different permeable and movable cleaning elements, wherein the cleaning elements comprise bristles, and are sucked away by a suction device located between the at least two cleaning elements. This can increase the quality of cleaning. In an advantageous embodiment, it can be provided that the at least two cleaning elements are cleaned of dirt particles by squeegees which contact the at least two cleaning elements at their ends. This can prevent the dirt particles from adhering to the cleaning elements and being merely circulated along the direction of movement.In an advantageous embodiment, it can be provided that the bristles of the cleaning elements are guided out of a cleaning area for their own cleaning. This can prevent the dirt particles from sticking in the cleaning elements and being merely circulated along the direction of movement. In an advantageous embodiment, it can be provided that the dirt particles in an area between the cleaning elements are deflected from a transport direction by the suction device. The trajectory of the dirt particles is preferably a hyperbolic trajectory. This allows the dirt particles to be removed from the soiled surface. In an advantageous embodiment, it can be provided that the dirt particles are accelerated through the at least two cleaning elements. The dirt particles are preferably accelerated in the direction of the suction device.In this way, a dynamic flow can be achieved which efficiently detaches the dirt particles adhering to the soiled surface from the surface. To achieve the stated object, the features of the invention are provided for use in cleaning a moving and soiled surface and additionally or alternatively for transporting particles on a surface. In this case, a cleaning device according to one of the features previously mentioned is used. The invention will now be described in more detail with reference to a few exemplary embodiments, but is not limited to these few exemplary embodiments. Further variants of the invention and exemplary embodiments arise from combining the features of one or more claims with one another and / or with one or more features of the exemplary embodiments and / or the previously described variants of devices and methods according to the invention.It shows: Fig. 1 a cleaning device in a perspective view according to the prior art and Fig. 2 the cleaning device from Fig. 1 in a side view according to the prior art and Fig. 3 a cleaning device according to the invention in a side view and Fig. 4 a cleaning device in a perspective view with cleaning elements on both sides and in mirror symmetry on the surface and Fig. 5 a cleaning element in a detailed view and Fig. 6 the cleaning device from Fig. 4 in a perspective view with suction devices on both sides and in mirror symmetry on the surface and Fig. 7 the cleaning device from Fig. 6 in a side view and PC 240245 C 13 / 26 March 8, 2024 Fig. 8 a cleaning device in a side view, wherein the cleaning device comprises more than two cleaning elements which act on both sides and in mirror symmetry on the soiled surface and Fig.9 shows a cleaning device in a perspective view, wherein the cleaning elements have the same permeability, and Fig. 10 shows a cleaning device in a perspective view, wherein the cleaning elements have different permeabilities. In the following description of various exemplary embodiments of the invention, elements which correspond in their function are given the same reference numerals, even if they have a different design or shape. For better clarity, not all reference numerals are used in the figures, although the elements may very well be present in the figures. However, the same reference numerals designate components and functional units which are functionally and / or structurally identical. Fig. 1 shows a cleaning device 1 in a perspective view according to the prior art.The cleaning device 1 here has a suction device 2 which is spaced from a soiled surface 3 which is moved in a transport direction 5 and on which dirt particles 4 are located. The cleaning device 1 in Fig. 1 is particularly well suited for surfaces 3 which move at a low speed (less than 1 meter per second) and wherein the dirt particles 4 exert no or only a low adhesive force on the surface 3. PC 240245 C 14 / 26 March 8, 2024 Fig. 2 shows the cleaning device 1 from Fig. 1 in a side view in the prior art. The funnel-shaped suction device 2 is shown in more detail, wherein the suction device 2 has a slotted opening 6 through which the dirt particles 4 are guided.At higher speeds of the surface 3, in particular at speeds greater than 1 meter per second, and with dirt particles 4 adhering to the surface 3, not all of the dirt particles 4 can be removed from the surface 3. This can be disadvantageous in situations in which a clean surface 3 is necessary, for example for a downstream process. The surface 3 can be made of wood, paper, metal, glass or plastic. Fig. 3 shows a cleaning device 1 according to the invention in a side view. The cleaning device 1 has two cleaning elements 7, which are designed as bristle belts 8. The bristle belts 8 comprise bristles 12. The bristles 12 are movable. Between the cleaning elements 7 there is a suction device 2, which has a slotted opening 6, which can suck away dirt particles 4 detached by the cleaning elements 7.The suction device 2 is located perpendicular to and above the surface 3. The cleaning elements 7 have identical permeability. In an alternative embodiment, the cleaning elements 7 have different permeabilities, with the cleaning element 7 arranged upstream in the transport direction 5 having a higher permeability. Permeability here refers to the flowability of the cleaning elements. The direction of movement 9 of the cleaning elements 7 is in the direction of the paper sheet (represented by a square) or in the direction out of the paper sheet (represented by a circle). In the specific example, the direction of movement 9 is in the opposite direction. In alternative embodiments, the direction of movement 9 can be the same. Next to the slotted opening 6 there is a collecting unit 10 in which dirt particles 4 can be collected.This is particularly advantageous in situations in which the dirt particles 4 have a higher mass and cannot be completely vacuumed away by the suction device 2 and remain in the suction device 2. The dirt particles 4, which have a higher mass and thus cannot be vacuumed away by the suction device 2, accumulate in the collection unit 10. The concentration of the dirt particles 4 increases in the collection unit 10. The collection unit 10 is preferably emptied manually. Alternatively, the collection unit 10 can be emptied automatically by an emptying device (not shown here). Fig. 4 shows a cleaning device 1 in a perspective view with the surface 3 and mirror-symmetrical cleaning elements 7 on both sides. The arrows symbolize the dirty surface 3 moving in the transport direction 5.In the specific example, four cleaning elements 7 are formed with steps 13, wherein the cleaning elements 7 have an identical permeability. In an alternative embodiment, the cleaning elements 7 arranged upstream in the transport direction 5 have a higher permeability. Thus, the dirt particles 4 can be efficiently sucked through the bristle belts 8 and accelerated towards a suction device 2 (not shown here). In the specific example, the direction of movement 9 of the cleaning elements 7 is opposite. In an alternative embodiment, the direction of movement 9 of the cleaning elements 7 can be the same. The different permeabilities of the cleaning elements 7 PC 240245 C 16 / 26 March 8, 2024 can be realized by flow channels 11, which are arranged transversely to the direction of movement 9 of the cleaning elements 7 and are preferably linear. Fig.Fig. 5 shows a detailed view of a cleaning element 7. The cleaning element 7 has a step 13, wherein in an area in a direction of movement 9 in front of the step 13 the bristles 12 of the cleaning element 7 are raised from the soiled surface 3. This is intended to ensure that the cleaning element 7 cannot damage the surface 3 during operation. The surface 3 is shown as a line in the specific example. Fig. 6 shows the cleaning device 1 from Fig. 4 in a perspective view with the surface 3 and mirror-symmetrical suction devices 2 on both sides. The suction devices 2 have slotted openings 6 through which the dirt particles 4 are sucked in. Collecting units 10 are formed next to the slotted openings 6. The larger arrows symbolize the transport direction 5 of the soiled surface 3, while the medium-sized arrows symbolize the direction of movement 9 of the cleaning elements 7.The smallest arrows represent the trajectory of the dirt particles 4 within the suction devices 2. The direction of movement 9 is transverse to the transport direction 5. Fig. 7 shows the cleaning device 1 from Fig. 6 in a side view. The cleaning elements 7 arranged upstream in the transport direction 5 have a higher permeability than the cleaning elements 7 arranged downstream. The different permeabilities of the cleaning elements 7 can be realized by flow channels 11, which are arranged transversely to the direction of movement 9 of the cleaning elements 7 and are preferably linear. The cleaning device 1 is arranged on both sides and mirror-symmetrically PC 240245 C 17 / 26 March 8, 2024 of the contaminated surface 3. Fig.Fig. 8 shows a cleaning device 1 in a side view, wherein the cleaning device 1 comprises more than two cleaning elements 7, which act on both sides and in a mirror-symmetrical manner on the soiled surface 3. The cleaning elements 7 arranged upstream in the transport direction 5 run in opposite directions to one another. The cleaning elements 7 arranged downstream also run in opposite directions to one another. The suction devices 2 are arranged between the cleaning elements 7. A total of eight cleaning elements 7 are shown in Fig. 8. The dirt particles 4 are sucked off on a hyperbolic trajectory and enter the suction devices 2. Fig. 9 shows a cleaning device 1 in a perspective view, wherein the cleaning elements 7 have the same permeabilities. A suction device 2 (shown here only symbolically) is arranged between the cleaning elements 7.The permeabilities of the cleaning elements 7 are realized by flow channels 11, which are arranged transversely to the direction of movement 9 of the cleaning elements 7 and are preferably linear. The cleaning elements 7, which are designed as bristle belts 8, are either co-rotating or counter-rotating. The flow channels 11 are formed by bristles 12 of different lengths or by a bristle-free partial body. The co-rotation or counter-rotation of the cleaning elements 7 is determined by the surface 3 to be cleaned, the dirt particles 4, and the degree of soiling. The suction device 2 is arranged vertically and above the surface 3 to be cleaned. The suction device 2 is arranged along a normal vector of the surface 3. The arrows of the direction of movement 9 are shown to illustrate the two cases of co-rotating cleaning elements 7 and counter-rotating cleaning elements 7. PC 240245 C 18 / 26 March 8, 2024 Fig.10 shows a cleaning device 1 in a perspective view, wherein the cleaning elements 7 have different permeabilities. The cleaning elements 7 are designed as bristle belts 8. The cleaning element 7 arranged upstream in the transport direction 5 has a higher permeability than the cleaning element 7 arranged downstream. The downstream cleaning element 7 is designed as a full-bristled body and has no flow channels 11. The cleaning elements 7 can be designed to rotate in opposite or parallel directions. The opposite or parallel direction of the cleaning elements 7 is determined by the surface 3 to be cleaned, the dirt particles 4 and the degree of soiling. In Figs. 7 and 8 it can be seen that the suction device 2 has a slotted opening 6, the width B1 of which is smaller than a spacing B2 between the at least two cleaning elements 7 and through which the dirt particles 4 can be suctioned off.It is also evident that the slotted opening 6 has a longitudinal extension L1 that is greater than one half, in particular greater than three-quarters, of a length L2 of at least one of the cleaning elements 7. The longitudinal extension L1 is measured from the beginning to the end of the multi-part slotted opening 6 without taking the interruptions into account. In a cleaning device 1 having at least two cleaning elements 7 that are spaced apart from one another and rotatable, wherein the cleaning elements 7 have movable bristles 12, it is proposed that a suction device 2 be arranged between the at least two cleaning elements 7. / List of reference symbols PC 240245 C 19 / 26 8.March 2024 List of reference symbols 1 cleaning device 2 suction device 3 surface 4 dirt particles 5 transport direction 6 slot opening 7 cleaning element 8 bristle belt 9 direction of movement 10 collection unit 11 flow channel 12 bristles 13 step L1 longitudinal extension L2 length B1 width B2 spacing / claims.

Claims

PC 240245 C 20 / 26 March 8, 2024 Claims 1. A cleaning device (1) with at least two cleaning elements (7) that are spaced apart from one another and movable, in particular rotatable, wherein the cleaning elements (7) have movable bristles (12), characterized in that a suction device (2) is arranged between the at least two cleaning elements (7).

2. A cleaning device (1), in particular according to claim 1, with at least two cleaning elements (7) that are spaced apart from one another and movable, in particular rotatable, wherein the cleaning elements (7) have movable bristles (12), characterized in that the at least two cleaning elements (7) have different permeabilities, in particular for fluids. 3.Cleaning device (1) according to claim 1 or claim 2, characterized in that a transport device (5) is formed which brings about a relative movement of a soiled surface (3) to the cleaning elements (7) in a transport direction (5).

4. Cleaning device (1) according to one of the preceding claims, characterized in that the at least two cleaning elements (7) are designed as bristle rollers and / or as bristle belts (8).

5. Cleaning device (1) according to one of the preceding claims, characterized in that a negative pressure, in particular caused by the suction device (2), prevails between the at least two cleaning elements (7).

6. Cleaning device (1) according to one of the preceding claims. PC 240245 C 21 / 26 March 8, 2024 Claims, characterized in that a distance of the bristles (12) from the soiled surface (3) is not constant in one, in particular lateral, region of the surface (3).

7. Cleaning device (1) according to one of the preceding claims, characterized in that the cleaning elements (7) move in a direction of movement (9) which is arranged transversely, in particular orthogonally, to the transport direction (5) of the soiled surface (3).

8. Cleaning device (1) according to one of the preceding claims, characterized in that one of the at least two cleaning elements (7) has flow channels (11) transversely to the transport direction (5) of the soiled surface (3) and / or transversely to the direction of movement (9) of the at least two cleaning elements (7). 9.Cleaning device (1) according to one of the preceding claims, characterized in that the at least two cleaning elements (7) have the same permeability.

10. Cleaning device (1) according to one of the preceding claims, characterized in that the flow channels (11) are formed by bristles (12) of different lengths or by a bristle-free partial body.

11. Cleaning device (1) according to one of the preceding claims, characterized in that the cleaning elements (7) are operated in opposite directions or in the same direction, in particular wherein one or the direction of movement (9) of the cleaning elements (7) is in the same direction or in opposite directions. PC 240245 C 22 / 26 March 8, 2024 12. Cleaning device (1) according to one of the preceding claims, characterized in that squeegees are formed, in particular which are arranged at a reversal point of the cleaning elements (7) and / or contact the cleaning elements (7) and strip dirt particles (4) from the cleaning elements (7), in particular the bristles (12).

13. Cleaning device (1) according to one of the preceding claims, characterized in that the squeegees have a separate suction unit which sucks away the dirt particles (4) stripped by the squeegees.

14. Cleaning device (1) according to one of the preceding claims, characterized in that the at least two cleaning elements (7) have flow channels (11) of different dimensions and permeabilities, in particular wherein the flow channels (11) are arranged transversely to one or the direction of movement (9) of the cleaning elements (7). 15.Cleaning device (1) according to one of the preceding claims, characterized in that the flow channels (11) are linear.

16. Cleaning device (1) according to one of the preceding claims, characterized in that an angle α between a longitudinal axis of the flow channels (11) and a width of the cleaning element (7) lies between 0° and 60°.

17. Cleaning device (1) according to one of the preceding claims, characterized in that the suction device (2) comprises a collecting unit (10) for collecting dirt particles (4). PC 240245 C 23 / 26 March 8, 2024 18. Cleaning device (1) according to one of the preceding claims, characterized in that the cleaning element (7) arranged upstream of the contaminated surface (3) in the transport direction (5) has a higher permeability than the cleaning element (7) arranged downstream.

19. Cleaning device (1) according to one of the preceding claims, characterized in that angles α between a longitudinal axis of the flow channels (11) and a width of the respective cleaning element (7) of the at least two cleaning elements (7) are of different sizes. 20.Cleaning device (1) according to one of the preceding claims, characterized in that the suction device (2) has a slotted opening (6) whose width (B1) is smaller than a spacing (B2) of the at least two cleaning elements (7) and through which the dirt particles (4) can be sucked away, and / or that the or a slotted opening (6) designed for sucking away dirt particles (4) has a longitudinal extent (L1) that is greater than one half, in particular greater than three-quarters, of a length (L2) of at least one of the cleaning elements (7).

21. Cleaning device (1) according to one of the preceding claims, characterized in that the suction device (2) has a funnel-shaped base body, in the bottom of which the slotted opening (6) and the collecting unit (10) are formed adjacent thereto. 22.Cleaning device (1) according to one of the preceding claims, characterized in that the at least two cleaning elements (7) are on both sides and mirror-symmetrical. PC 240245 C 24 / 26 March 8, 2024 the soiled surface (3).

23. Cleaning device (1) according to one of the preceding claims, characterized in that two suction devices (2) are formed, which are arranged on both sides and mirror-symmetrically to the soiled surface (3).

24. Cleaning device (1) according to one of the preceding claims, characterized in that the transport direction (5) of the soiled surface (3) and one or the movement direction (9) of the cleaning elements (7) are arranged transversely, in particular orthogonally, to one another.

25. Cleaning device (1) according to one of the preceding claims, characterized in that the at least two cleaning elements (7) have a step (13), wherein in a region in front of the step (13) the bristles (12) of the cleaning element (7) are raised from the soiled surface (3). 26.Method for cleaning a soiled surface (3), in particular wherein a cleaning device (1) is designed according to one of claims 1 to 25, wherein dirt particles (4) are guided through at least two differently permeable and movable cleaning elements (7), wherein the cleaning elements (7) comprise bristles (12), and are sucked away by a suction device (2) which is located between the at least two cleaning elements (7).

27. Method according to claim 26, characterized in that the at least two cleaning elements (7) are connected by squeegees which contact the at least two cleaning elements (7) at the ends. PC 240245 C 25 / 26 March 8, 2024 contact, are cleaned of dirt particles (4).

28. Method according to one of the preceding claims, characterized in that the bristles (12) of the cleaning elements (7) are guided out of a cleaning area for their own cleaning.

29. Method according to one of the preceding claims, characterized in that the dirt particles (4) are deflected from a transport direction (5) by the suction device (2) in a region between the cleaning elements (7), in particular wherein the trajectory is a hyperbolic trajectory.

30. Method according to one of the preceding claims, characterized in that the dirt particles (4) are accelerated through the at least two cleaning elements (7), in particular in the direction of the suction device (2). 31.Use of a cleaning device (1) according to one of claims 1 to 25 for cleaning a moving and contaminated surface (3) and / or for transporting particles on a surface (3). / Summary.

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